26w20c: Hotfixes

Some more CPU improvements due to physics refactor.

This build is a bit risky at features some heavy refactor to fight crash, so please tell me if you find any regression!

Bugfixes

• #7636 Rescue Missions can break the game.

• #7642 Crash when exiting the game during command selection

• #7645 Random Crash

• #7648 Help message cancel stretch

• #7620 Mining beams were blocked by inactive debris field shields.

• Shipyard menu not accessible through a screen.

Thanks for playing!